Remove/install radiator unit

AR20.20-S-3871EA

Remove/install radiator unit

17.07.2019

Engine

654.9 in model 447

Shown with code HH9 (Semi-automatically controlled air conditioning, TEMPMATIC) and code FY1 (Anti-Theft Protection Package)

1

Radiator unit

6

Carrier

9

Electrical connector

2

Electrical wiring harness

7

Bolts

10

Cover

3

Bolts

8.1

Upper part fastener

11

Cable

4

Crossmember

8.2

Lower part fastener

12

Electrical connector

5

Carrier

Shown with CODE HH9 (Semi-automatically regulated air conditioning, TEMPMATIC)

1

Radiator unit

13

Left air duct segment

15

Electrical connector

4

Crossmember

14

Outside temperature sensor

16

Elastomer bearing

6

Carrier

17

Cover

18

Retaining clips

 Danger

Risk of fire due to ignition of R1234yf refrigerant on hot components. Risk of poisoning caused by inhaling overheated refrigerant vapors. Risk of injury to skin and eyes caused by contact with escaped R1234yf refrigerant and when working on pressurized parts. Risk of explosion due to formation of ignitable refrigerant/air mixtures

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0007-01A

 Warning

Risk of poisoning caused by inhaling overheated refrigerant vapors from an air conditioning system containing R134a. Risk of injury to skin and eyes caused by contact with liquid R134a refrigerant and when working on pressurized parts

Never perform welding work on or near a closed air conditioning system. No smoking or open flames. Wear safety glasses and protective gloves. Work only in well ventilated rooms. Carry out repair work on the air conditioning system circuit only after the system has been evacuated.

AS83.00-Z-0006-01A

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Topical note

Protect air conditioning circuit and components from moisture when carrying out repair work

AH83.30-N-0005-01A

Notes on handling refrigerant R1234yf

AH83.30-P-0003-02A

Notes on handling refrigerant R134a

AH83.30-N-0003-01A

 

Remove/install

1

Discharge air conditioning system.

Model 447 with code HX1 (R-1234yf refrigerant)

AR83.30-S-1760EF

Model 447 except code HX1 (R-1234yf refrigerant)

AR83.30-S-1760E

2

Drain off coolant.

AR20.00-S-1142E

3

Remove front bumper.

AR88.20-S-2000E

4

Remove resonator box.

AR09.20-S-0010EA

5

Remove low-temperature circuit valve with holder from cooler unit (1).

AR20.00-S-1048EA

 Do not remove or separate coolant lines and electric line.

6

Remove differential pressure sensor on cooler unit (1).

AR07.04-S-0025E

 Do not remove or separate electric line and pressure hose.

7

Remove both refrigerant lines on refrigerant condenser.

Engine 654.9 in model 447
with code HH4 (THERMOTRONIC automatic climate control)
Engine 654.9 in model 447
with code HH9 (Air conditioner, automatic heater control)

AR83.30-S-0013EA

8

Detach electrical connection (9).

Engine 654.9 in model 447
with code FY1 (Anti-Theft Protection package)
Engine 654.9 in model 447
with code FZ5 (Anti-theft alarm system)

9

Remove cover (10) from hood catch and unhook cable (11).

AR88.40-S-2629E

10

Unclip cover (17) from retaining clamps (18) and remove forward in direction of arrow (A).

11

Disconnect electrical connector from the horn.

Model 447.6/7

12

Remove electrical wiring harness (2) from carrier (5) and crossmember (4).

13

Remove screw/bolts (3).

 Screw, front module carrier to crossmember

*BA62.30-N-1002-01C

14

Remove screws (7) and remove carrier (5).

15

Detach electrical connector (12) of fan unit and remove electrical wiring harness from cooler unit (1).

16

Remove left and right upper section fasteners (8.1) in upward direction.

 Clip remover

*452589016300

17

Turn left and right lower section fasteners (8.2) by 90° and remove in upward direction.

18

Unclip outside temperature sensor (14) from left air duct segment (13).

19

Disconnect electrical connector (15) at refrigerant pressure and temperature sensor.

Engine 654.9 in model 447
with code HH4 (THERMOTRONIC automatic climate control)
Engine 654.9 in model 447
with code HH9 (Air conditioner, automatic heater control)

20

Remove air duct segments on cooler unit (1).

AR20.20-S-3871-03EA

21

Disconnect coolant hoses from cooler.

Open, close coolant line coupling

AR20.20-P-7441-01RQ

AR20.20-S-3865-09EA

 Set of protective covers

*001589019100

 Set of protective caps

*001589009100

22

Carefully tilt cooler unit (1) at top forward and lift out in upward direction between carrier (6) and crossmember (4).


Do not damage cooler unit (1) on carrier (6) or crossmember (4).
Parts of the cooler unit (1) will otherwise be damaged.

 Helper required.



Check

23

Check upper section fastener (8.1) for damage.

If there is a problem,



Replace upper section fastener (8.1).

24

Check lower section fastener (8.2) for damage.

If there is a problem,



Replace lower section fastener (8.2).

25

Check elastomer bearings (16) for wear and damage.

If there is a problem,



Replace elastomer bearings (16).

26

Install in the reverse order.

 Cross member and front reinforcement

Number

Designation

Model 447, 448

BA62.30-N-1002-01C

Screw, front module carrier to crossmember

Nm

12